diff --git a/.github/workflows/sigma-test.yml b/.github/workflows/sigma-test.yml
index 2d1f625b3..88c6d0502 100644
--- a/.github/workflows/sigma-test.yml
+++ b/.github/workflows/sigma-test.yml
@@ -24,7 +24,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pipenv
+        pip install pipenv==2021.5.29
         pipenv lock
         pipenv install --dev --deploy
     - name: Test Sigma Tools and Rules